iPhone North American AT&T phone plan work in Puerto Rico?

Does anyone have any experience with using the iphone 3g with the North American plan in PR? Are both voice and data included in the basic plan or only the voice?

AT&T, surprisingly, could not easily tell me - it seems as if the voice is included but text messages and data are not. Although, I thought the text messages went through on the voice band and not data.

at&t treats Puerto Rico like the rest of the US. There should be no problem with data or voice, since at&t used to have a network there, and now has a roaming agreement with the company they sold their network to.

I am here in PR and have data roaming turned off. I have edge and 3g and data comes to my phone anyway. I am assuming that it means it is included otherwise, with data roaming off, I should only have voice.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.